Ensuring PRC-029-1 Compliance for Inverter-Based Resources (IBRs)

Understanding NERC PRC-029-1 and Its Importance 

NERC is dedicated to maintaining and improving the reliability of the power grid, and the PRC-029-1 standard is the latest step in this initiative. Though currently under review by FERC, industry experts anticipate that the standard will be approved by 2026.  

But What Does PRC-029-1 Mean for Entities Operating Inverter-Based Resources (IBRs)? 

PRC-029-1 introduces a performance-based compliance framework that requires IBRs to be both designed and operated to maintain current exchange and deliver voltage support during grid disturbances — meeting specified ride-through requirements outlined in the "must ride-through" operating zone.  

To comply, IBR facility owners need to demonstrate that their plants are designed to meet these requirements by PRC-029-1's effective date and maintain compliance during operation. Success depends significantly on accurate modeling and testing of IBR performance under varying conditions.  

This post outlines the best practices and key steps to achieve compliance, helping your team expertly navigate this upcoming standard.  

Best Practices for PRC-029-1 Compliance  

Compliance with PRC-029-1 may sound daunting, but with meticulous preparation and advanced modeling techniques, organizations can confidently meet their requirements. Electromagnetic Transient (EMT)-based ride-through studies are crucial for accurate assessment of equipment dynamic behavior. These studies ensure proper tuning of control and protection settings, enabling the plant to meet PRC-029-1 requirements. Key sub-tasks include: 

• EMT Modeling: Accurate parameterization of OEM-specific EMT models with site-specific settings is essential. 
• Equipment Capability: Studies must utilize the true maximum equipment ride-through capability, and substation equipment protection settings must be coordinated accordingly. 
• System Optimization: A balance must be achieved between ride-through control and protection settings to optimize ride-through performance while safeguarding equipment from potential damage. 

 Why EPE Stands Out for PRC-029-1 Compliance Support  

 Meeting the complex technical requirements of PRC-029-1 demands a team that combines technical expertise with an in-depth understanding of compliance. Here's why EPE is the trusted partner for PRC-029-1 compliance.

1. Industry-Leading Modeling Expertise  

Strong collaboration between IBR owners and original equipment manufacturers (OEMs) is a crucial component of compliance. OEMs play a pivotal role in delivering accurate models, troubleshooting performance issues, and optimizing equipment capabilities. Entities should establish effective communication channels with PPC, inverter, and turbine OEMs to ensure seamless integration of their models into compliance studies. EPE boasts a team of seasoned EMT modeling specialists who are proficient experts in parameterizing OEM-specific models. Collaborating closely with major PPC, inverter, and turbine manufacturers, EPE helps to ensure that all simulations accurately reflect real-world performance.

2. Proven Track Record of Success  

EPE holds an extensive history of conducting advanced dynamic simulations to support regulatory compliance. For example, during the implementation of PRC-024 (the precursor to PRC-029-1), EPE conducted hundreds of studies that went beyond simplified curve comparisons, using rigorous modeling techniques to deliver superior results.

3. Comprehensive Compliance Solutions  

EPE offers more than technical modeling. Our approach integrates compliance assistance, providing a full suite of services that cover everything from simulation to reporting, and helping clients establish sound operational compliance programs.

Preparing for PRC-029-1 Compliance  

PRC-029-1 is a reminder that maintaining grid reliability is a shared responsibility, especially as utilities and operators integrate growing volumes of inverter-based resources like solar and wind.  

Achieving compliance requires early preparation, technical expertise, and collaboration between IBR entities, regulators, and OEMs. By implementing advanced EMT studies, coordinating protection systems, and leveraging expert support like that provided by EPE, your organization can confidently meet the 2026 regulatory milestone.
 

Get ahead of the curve and ensure your IBR facilities are ready for PRC-029-1 compliance. Reach out to EPE today to learn how our comprehensive solutions can simplify this complex process.